Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1993 GMC Jimmy TyphoonFACTORY OEM SERVICE PROCEDURE
Control Units
CONTROL UNITS LOCATION
| Component | Location | |
|---|---|---|
| ABS Module | ||
| RWAL | Below master cylinder. | |
| 4WAL | On left inner fender panel. | |
| Audio Alarm Module | On convenience center. | |
| Cruise Control Module | On left side of steering column. | |
| Daytime Running Lights (DRL) Module | Above fuse block. | |
| Digital Radio Adapter Controller (DRAC) (4.3L Turbo) | Behind right side of dash. | |
| Diode Module (4.3L) | On wiring harness above fuse block. | |
| Elapsed Timer Module (2.8L) | Under right side of dash, next to ECM. See Figure . | |
| Elec. Shift Transfer Case Module | Near ECM/PCM | |
| Electronic Control Module (ECM) | ||
| 2.5L (VIN A) | Behind right side of dash. See Figure . | |
| 2.8L (VIN R) | Behind right side of dash. See Figure . | |
| 4.3L (VIN Z - Turbo) | Behind right side of dash. See Figure . | |
| Ignition Control Module (IC) | Inside distributor assembly. | |
| Intake Manifold Tuning Valve Controller (4.3L - VIN W) | On top of intake manifold. | |
| Keyless Entry Module | Under Center Console. | |
| Knock Sensor Control Module | ||
| 2.8L (VIN R) | Near center of firewall. See Figure . | |
| 4.3L (VIN Z - A/T Non-Turbo) | Near center of firewall. See Figure . | |
| Powertrain Control Module (PCM) | ||
| 4.3L (VIN W) | Behind right side of dash. See Figure . | |
| 4.3L (VIN Z - A/T Non-Turbo) | Behind right side of dash. See Figure . | |
| Vehicle Control Module (VCM) (4.3L VIN Z - M/T Non-Turbo) | Behind right side of dash. See Figure . | |
| Windshield Wiper Module | On center of firewall. | |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.